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Skin care compositions

a skin care and composition technology, applied in the field of skin care compositions, can solve the problems of limiting the use of saib (100%) in skin care products or as a skin care product by itself, and is difficult to incorporate saib into cosmetic/personal care products

Inactive Publication Date: 2005-10-20
EASTMAN CHEM CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0006] We have discovered that the viscosity and tackiness problems that limit the utility of SAIB in skin care compositions can be overcome by blending certain glycerol triesters with SAIB. Such blends have been found to be useful in liquid skin care compositions wherein the blends exhibit smoothness when applied to human skin and excellent resistance to removal with water. These characteristics are advantageous in the formulation of liquid skin care compositions including cosmetics. Thus, in its broader aspects, the present invention provides a liquid skin care composition comprising a pre-blended mixture of SAIB and a glycerol tri-carboxylate ester or propylene glycol di-carboxylate ester wherein the carboxylate residues are residues of carboxylic acids containing 2 to 10 carbon atoms and wherein the composition contains one or more skin care or cosmetic agents selected from colorants, skin emollients, sunscreen agents and therapeutic agents. In another embodiment, the liquid skin care compositions provided by the present invention comprise an oil-in-water emulsion wherein the oil (discontinuous) phase comprises a pre-blended mixture of SAIB and a glycerol tri-carboxylate ester or propylene glycol di-carboxylate ester wherein the carboxylate residues are residues of carboxylic acids containing 2 to 10 carbon atoms and wherein the emulsion contains one or more skin care or cosmetic agents selected from colorants, skin emollients, sunscreen agents and therapeutic agents. We have found that pre-blended mixtures of SAIB and one or more glycerol tri-esters and / or propylene glycol di-esters of carboxylic acids containing 2 to 10 carbon atoms are compatible, i.e., miscible, with SAIB and form clear mixtures that do not separate upon standing for prolonged periods of time. Another embodiment of the present invention is an aerosol skin care composition comprising a pre-blended mixture of SAIB and a glycerol tri-carboxylate ester or a propylene glycol di-carboxylate ester wherein the carboxylate residues are residues of carboxylic acids containing 2 to 10 carbon atoms, one or more skin care or cosmetic agents selected from colorants, skin emollients, sunscreen agents and therapeutic agents, and a propellant.

Problems solved by technology

SAIB (100%) is difficult to incorporate into cosmetic / personal care products because of its high viscosity and because it is extremely tacky.
The high viscosity and, especially, the tackiness (stickiness) of SAIB severely limits its use in skin care products or as a skin care product by itself.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0019] Various blends of SAIB and glycerol and propylene glycol esters were prepared as described above by first heating the SAIB to about 60° C. to make it pourable. The SAIB and ester additive were weighed into a jar and mixed together. The mixture then was heated and mixed to ensure homogeneity. The blends prepared are shown in Table I. For those blends in Table I indicated as being cloudy or separated, the cloudiness or separation developed as, or after, the mixture cooled to room temperature. Those blends indicated as providing a smooth feel on the skin had a glossy appearance, and provided a water-resistant coating on the skin that was difficult to wash off with soap and water. The water-resistance of the coating on the skin was apparent from the appearance of water beads as water was rinsed over the skin. The same effects of smoothness, gliding, gloss, and water resistance were noted when these mixtures were applied to the lips.

TABLE IWeight Ratio of Ester Additive:SAIBEste...

example 2

[0020] The contact angle of water on films of the SAIB / ester additive blends was measured to show the water resistant nature of these mixtures. Contact angle is a measure of the surface wettability and is described in Test Method ASTM D5725-99. For each blend listed in Table II, 0.2 g of SAIB / ester additive blend was weighed onto a piece of 50 pound Kraft paper measuring 28.3 cm2. The blend was spread with the finger to cover the surface of the Kraft paper. Water droplets were dropped onto the coated Kraft paper. The contact angle of each drop resting on the surface of the coated paper was measured on an enlarged video image of each drop displayed on a monitor. Water droplets dropped onto uncoated Kraft paper quickly soaked into the paper. Therefore, the contact angle of water on uncoated paper is effectively 0°. Contact angles for coated paper are given in Table 2. A higher contact angle indicates less wettability and greater water resistance of the SAIB / ester additive blend. A tre...

example 3

[0021] Water vapor transmission rates (WVTR) were measured on films of the SAIB / ester additive blends to determine if the blends improve moisture retention in the skin. The WVTR of Vaseline® Intensive Care® Water Resistant Skin Protectant Lotion (VIC) was measured for comparison. For each blend and the VIC lotion evaluated, 0.5 g of the blend of the VIC lotion was weighed into the center of a piece of Kraft paper, 9.5 cm in diameter. The mixture was spread with the finger to cover the surface of the Kraft paper. WVTR was determined according to ASTM E96. Conditions of the test were 32° C. and 50% room humidity. The results are given in Table III wherein the values reported for WVTR are g / m2 / 24 hours.

TABLE IIIEster Additive / SAIB BlendWVTR20 / 80 Glycerol Triacetate / SAIB60120 / 80 Glycerol Tricaprylate / caprate / SAIB483, 570*VIC Lotion759Kraft Paper, Uncoated1749

*Two determinations at different times

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Abstract

Disclosed are skin care compositions comprising an admixture of sucrose acetate isobutyrate and certain diol and glycerol carboxylate esters. The liquid skin care compositions are useful as cosmetic, protective and therapeutic dermatological compositions and comprise an admixture of sucrose acetate isobutyrate and one or more carboxylic acid esters of a polyol selected from propylene glycol and glycerol wherein the carboxylate ester residues contains from 2 to 10 carbon atoms. The skin care compositions exhibit smoothness and water resistance when applied to the skin such as the human body including eyelids and lips.

Description

FIELD OF THE INVENTION [0001] This invention pertains to skin care compositions comprising an admixture of sucrose acetate isobutyrate and certain diol and glycerol carboxylate esters. More specifically, this invention pertains to liquid skin care compositions such as cosmetic, protective and therapeutic dermatological compositions comprising an admixture of sucrose acetate isobutyrate and one or more carboxylic acid esters of a polyol selected from propylene glycol and glycerol wherein the carboxylate ester residues contains from 2 to 10 carbon atoms. The skin care compositions exhibit smoothness and water resistance when applied to the skin such as the human body including eyelids and lips. BACKGROUND OF THE INVENTION [0002] Sucrose acetate isobutyrate (SAIB) is a stable liquid used as a weighting agent in citrus beverages such as fruit juices, energy drinks, and carbonated soft drinks. Weighting agents have a relatively high specific gravity and are mixed with the flavoring oils ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61K8/37A61K8/60A61K8/73A61Q1/02A61Q1/10A61Q5/00A61Q17/04A61Q19/00
CPCA61K8/375A61K8/60A61Q1/02A61Q19/00A61Q17/00A61Q17/04A61Q1/10
Inventor MINGA, ROBIN LYNNDOBBS, SUZANNE WINEGAROLDFIELD, TERRY ANN
Owner EASTMAN CHEM CO
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